我正在尝试为我的 Highcharts 散点图获取正确的 Json 输出，请参阅 example .

我想要的Json输出:

[{
        "name": "Female",
        "color": "red",
        "data": [{
            "name": "Anna",
            "x": 161.2,
            "y": 51.6
        }, {
            "name": "Clair",
            "x": 167.5,
            "y": 59.0
        }]
    },
    {
        "name": "Male",
        "color": "blue",
        "data": [{
            "name": "James",
            "x": 174.0,
            "y": 65.6
        }]
    },
    {
        "name": "Peet",
        "color": "black",
        "data": [{
            "name": "Peet",
            "x": 175.3,
            "y": 71.8
        }]
    }
]

数据.php

<?php

$arr    = array();
$arr1   = array();
$arr2   = array();
$result = array();

$sql = "SELECT `gender`, `name`, `length`, `weight`
            FROM `highcharts_data`
            WHERE `gender` = 'Female'";
$q   = mysqli_query($mysqli,$sql);

while($row = mysqli_fetch_assoc($q)){
$arr['name'] = 'Female';
$arr['data'] = array([(float)$row['length'], (float)$row['weight']]);
$arr['color'] = 'red';

array_push($result,$arr);
}

$sql1 = "SELECT `gender`, `name`, `length`, `weight`
            FROM `highcharts_data`
            WHERE `gender` = 'Male' AND `name` != 'Peet'";
$q1  = mysqli_query($mysqli,$sql1);

while($row = mysqli_fetch_assoc($q1)){
$arr1['name'] = 'Male';
$arr1['data'] = array([(float)$row['length'], (float)$row['weight']]);
$arr1['color'] = 'blue';

array_push($result,$arr1);
}

$sql2 = "SELECT `gender`, `name`, `length`, `weight`
            FROM `highcharts_data`
            WHERE `gender` = 'Male' AND `name` = 'Peet'";
$q2  = mysqli_query($mysqli,$sql2);

while($row = mysqli_fetch_assoc($q2)){
$arr2['name'] = 'Peet';
$arr2['data'] = array([(float)$row['length'], (float)$row['weight']]);
$arr2['color'] = 'black';

array_push($result,$arr2);
}

print json_encode($result, JSON_NUMERIC_CHECK);
mysqli_close($mysqli);
?>

我得到的 Json 输出:

[{
    "name": "Female",
    "data": [
        [161.2, 51.6]
    ],
    "color": "red"
}, {
    "name": "Female",
    "data": [
        [167.5, 59]
    ],
    "color": "red"
}, {
    "name": "Male",
    "data": [
        [174, 65.6]
    ],
    "color": "blue"
}, {
    "name": "Peet",
    "data": [
        [175.3, 71.8]
    ],
    "color": "black"
}]

谁能告诉我如何更改 data.php 文件，以便我获得正确的 Json 输出!

谢谢!

最佳答案

这是一个工作示例，说明如何将 PHP 格式化为 JSON。这不包括 mysql 部分，但应该不很难弄清楚。

2017/10/12更新，修正双数据错误:

更新于2017/10/16，更正了没有数组推送的错误:

<?php
$males   = array();
$malepersons = array();
$females = array();
$femalepersons = array();
$result  = array();

$values = [[
    "name" => 'Anna',
    "height" => 175,
    "weight" => 53.4,
    "gender" => 'Female'
    ],[
    "name" => 'Dan',
    "height" => 185.1,
    "weight" => 90.4,
    "gender" => 'Male'
    ] ];

//Simplified for loop
foreach ($values as $row){
    $person = array();
    $person['name'] = $row['name'];
    $person['x'] = $row['height'];
    $person['y'] = $row['weight'];

    if($row['gender'] == 'Male'){
        array_push($malepersons, $person);        
    } elseif($row['gender'] == 'Female') {
        array_push($femalepersons, $person);
    }
}

//took these out of the for loop, only need to be set once
$males['color'] = 'black'; 
$males['name'] = 'Male';
$males['data'] = $malepersons;
$females['color'] = 'green';
$females['name'] = 'Female';
$females['data'] = $femalepersons;


array_push($result, $males);
array_push($result, $females);
print json_encode($result, JSON_NUMERIC_CHECK);
?>

这将为您提供如下所示的 JSON:

[{
  "color": "black",
  "name": "Male",
  "data": [{
    "name": "Dan",
    "x": 185.1,
    "y": 90.4
  }]
}, {
  "color": "green",
  "name": "Female",
  "data": [{
    "name": "Anna",
    "x": 175,
    "y": 53.4
  }]
}]

这就是 highcharts 想要的系列输入。

在您的例子中，$values 数组实际上是 SQL 返回的数据，您只需要将循环更改为循环您希望它循环的内容即可。

添加了工作示例:https://ideone.com/RPp3DO

键控数组上的 PHP 文档:http://php.net/manual/en/language.types.array.php

关于mysql - Highcharts Mysql Json 数组 PHP，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46687273/